Soft magnetic metal powder, dust core, and magnetic component
A metal powder and powder magnetic core technology, which is applied in the field of powder magnetic cores and magnetic parts, soft magnetic metal powder, can solve the problem of increased loss, increase in the proportion of soft magnetic metal particles in contact with each other, and reduced loss of powder magnetic cores. Large and other problems, to achieve the effect of good voltage resistance and strength
Pending Publication Date: 2021-03-30
TDK CORPARATION
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Problems solved by technology
However, in this method, the ratio of soft magnetic metal particles in contact with each other increases, and when an AC voltage is applied to the magnetic part, the loss due to the current flowing between the contacting particles (eddy current between particles) increases
As a result, there is a problem that the loss of the dust core becomes large
Method used
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[0181] Hereinafter, the invention will be described in more detail using examples, but the invention is not limited to these examples.
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Abstract
The invention provides a dust core having satisfactory withstand voltage properties and strength, a magnetic component including the dust core, and a soft magnetic metal powder suitable for the dust core. The soft magnetic metal powder includes a plurality of soft magnetic metal particles containing iron, wherein a surface of each of the soft magnetic metal particles is covered with a coating part, and a maximum height Sz of a surface of the coating part is 10 to 700 nm. The soft magnetic metal powder includes a plurality of soft magnetic metal particles containing iron, wherein a surface of each of the soft magnetic metal particles is covered with a coating part, and a maximum height Rz of a surface of the coating part is 10 to 700 nm.
Description
technical field [0001] The present invention relates to soft magnetic metal powder, powder magnetic core and magnetic parts. Background technique [0002] As magnetic components used in power supply circuits of various electronic devices, transformers, choke coils, inductors, and the like are known. [0003] Such a magnetic component has a structure in which a coil (winding) as an electric conductor is arranged around or inside a magnetic core (core) exhibiting predetermined magnetic properties. [0004] A soft magnetic metal material containing iron (Fe) is exemplified as a magnetic material used for a magnetic core included in a magnetic component such as an inductor. The magnetic core can be obtained, for example, as a powder magnetic core by compression-molding soft magnetic metal powder containing particles of a soft magnetic metal containing Fe. [0005] In such powder magnetic cores, in order to improve magnetic properties, the ratio of magnetic components (filling ...
Claims
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IPC IPC(8): H01F1/20H01F3/08
CPCH01F1/20H01F3/08H01F1/15333H01F1/24
Inventor 小枝真仁吉留和宏松元裕之
Owner TDK CORPARATION